TWI305094B - Method and system for link adaptation in an orthogonal frequency division multiplexing (ofdm) wireless communication system - Google Patents

Method and system for link adaptation in an orthogonal frequency division multiplexing (ofdm) wireless communication system Download PDF

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Publication number
TWI305094B
TWI305094B TW094125662A TW94125662A TWI305094B TW I305094 B TWI305094 B TW I305094B TW 094125662 A TW094125662 A TW 094125662A TW 94125662 A TW94125662 A TW 94125662A TW I305094 B TWI305094 B TW I305094B
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Taiwan
Prior art keywords
channel
sub
channel quality
quality indicator
subchannel
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TW094125662A
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English (en)
Chinese (zh)
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TW200623697A (en
Inventor
Koo Chang-Soo
Zhang Guodong
Lind Olesen Robert
Yingming Tsai
Huang Yuejin
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Interdigital Tech Corp
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Publication of TW200623697A publication Critical patent/TW200623697A/zh
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Publication of TWI305094B publication Critical patent/TWI305094B/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
TW094125662A 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (ofdm) wireless communication system TWI305094B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60074104P 2004-08-11 2004-08-11
US11/123,738 US20060034244A1 (en) 2004-08-11 2005-05-06 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system

Publications (2)

Publication Number Publication Date
TW200623697A TW200623697A (en) 2006-07-01
TWI305094B true TWI305094B (en) 2009-01-01

Family

ID=35799854

Family Applications (3)

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TW097128904A TW201004195A (en) 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system
TW095104276A TW200705872A (en) 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system
TW094125662A TWI305094B (en) 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (ofdm) wireless communication system

Family Applications Before (2)

Application Number Title Priority Date Filing Date
TW097128904A TW201004195A (en) 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system
TW095104276A TW200705872A (en) 2004-08-11 2005-07-28 Method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system

Country Status (12)

Country Link
US (1) US20060034244A1 (de)
EP (2) EP2187554A1 (de)
JP (1) JP2008510374A (de)
KR (2) KR20070059086A (de)
AU (2) AU2005274162B2 (de)
BR (1) BRPI0515018A (de)
CA (1) CA2576481A1 (de)
IL (1) IL181026A0 (de)
MX (1) MX2007001709A (de)
NO (1) NO20071261L (de)
TW (3) TW201004195A (de)
WO (1) WO2006020400A2 (de)

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Also Published As

Publication number Publication date
NO20071261L (no) 2007-03-08
KR20070067705A (ko) 2007-06-28
WO2006020400A3 (en) 2006-12-07
BRPI0515018A (pt) 2008-07-01
US20060034244A1 (en) 2006-02-16
EP2187554A1 (de) 2010-05-19
MX2007001709A (es) 2007-04-16
AU2008243233A1 (en) 2008-12-04
AU2005274162B2 (en) 2008-08-14
TW200623697A (en) 2006-07-01
AU2005274162A1 (en) 2006-02-23
EP1779571A2 (de) 2007-05-02
WO2006020400A2 (en) 2006-02-23
IL181026A0 (en) 2007-07-04
EP1779571A4 (de) 2007-12-19
TW200705872A (en) 2007-02-01
TW201004195A (en) 2010-01-16
KR20070059086A (ko) 2007-06-11
CA2576481A1 (en) 2006-02-23
JP2008510374A (ja) 2008-04-03

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